Subtract 18/90 from 7/60
7/60 - 18/90 is -1/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 60 × 3 = 180,
7/60 = 7 × 3/60 × 3 = 21/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
18/90 = 18 × 2/90 × 2 = 36/180 - Subtract the two like fractions:
21/180 - 36/180 = 21 - 36/180 = -15/180 - After reducing the fraction, the answer is -1/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/60-18/90 7/60-36/90 21/60-18/90 7/60-54/90 35/60-18/90 49/60-18/90